SV-BAT-320 Backup Battery Installation
6-4 SkyView HDX System Installation Manual - Revision E
6.3 Charging the SV-BAT-320
Do not attempt to charge the SV-BAT-320 using any other charging unit.
Doing so may risk damaging the SV-BAT-320. The only safe method of
charging an SV-BAT-320 is to connect it to a SkyView HDX display.
6.3.1 SV-BAT-320 is Automatically Charged in Flight
An SV-BAT-320 connected to a SkyView display is automatically charged by the SkyView
display when there is adequate power applied to the SkyView display. If the SV-BAT-320
becomes discharged, on the next flight the SkyView display will automatically charge the
SV-BAT-320. Charging, when necessary, required a minimum input voltage of 12.25 Volts
supplied to the SkyView display. To prevent discharging the aircraft battery excessively
(when not in flight), the SkyView display will not attempt to charge the SV-BAT-320 when
the input voltage to the SkyView display is lower than 12.25 volts.
6.3.2 Charging the SV-BAT-320 on Ground or During Aircraft Construction
As with all new lithium-ion batteries, the SV-BAT-320 is manufactured,
stored in inventory (Dynon Avionics, dealers, and aircraft manufacturers),
and shipped in a partially-charged state. Occasionally, typically after a year
or more with no charging, the SV-BAT-320 may appear to be fully
discharged – the SkyView display may not be able to detect that a battery is
installed.
To prevent becoming totally discharged, all lithium-ion batteries, including
the SV-BAT-320, incorporate internal safety circuitry (protection mode) that
will disconnect the load (SkyView display) when the lithium-ion battery’s
state of charge is very low.
Prior to Software v15.0, SkyView displays could not detect when an SV-
BAT-320 was in this state (protection mode due to low state of charge) and
thus the SkyView display would not attempt to charge the SV-BAT-320.
Software v15.0 and later incorporates an improvement to the charging
algorithm; the SkyView display is able to detect this state and charge an
SV-BAT-320 that is in protection mode.
As explained above, to prevent discharging the aircraft battery excessively (when not in
flight), the SkyView display will not attempt to charge the SV-BAT-320 when the input
voltage is lower than 12.25 volts. During aircraft construction, or if the aircraft will not be
flown for an extended period, the SkyView display can charge the SV-BAT-320 if the
following conditions are met:
• For each SkyView display that will be charging an SV-BAT-320, the aircraft’s
battery charger must be able to supply at least 5 amps (5A) (for a 12 volt
electrical system; 2.5A for a 24 volt electrical system). If you have two (2)
SkyView displays with SV-BAT-320s, and you wish to charge them
simultaneously, the battery charger must be capable of supplying 10A.
• Under full load (5A), the aircraft battery charger must be capable of supplying
13 volts (13V) to the SkyView display. Supplying 13V to the aircraft electrical
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